can b12 injections affect kidneys Vitamin for Aging and Longevity What Does a B12 Shot
Description
How to test A blood test is done to check for vitamin B12 or folate deficiency

More than two thirds of the B 12 excreted in bile is reabsorbed in the small intestine, but this reabsorption is reduced in people with pernicious anaemia or other causes of B 12 malabsorption
PMID: 38673453
Pills are a reasonable choice for maintenance when your levels are already healthy and you simply want to keep them there
